1 //===- MCAsmParserExtension.cpp - Asm Parser Hooks ------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "llvm/MC/MCParser/MCAsmParserExtension.h"
10 #include "llvm/MC/MCContext.h"
11 #include "llvm/MC/MCExpr.h"
12 #include "llvm/MC/MCParser/MCAsmLexer.h"
13 #include "llvm/MC/MCStreamer.h"
14
15 using namespace llvm;
16
17 MCAsmParserExtension::MCAsmParserExtension() = default;
18
19 MCAsmParserExtension::~MCAsmParserExtension() = default;
20
Initialize(MCAsmParser & Parser)21 void MCAsmParserExtension::Initialize(MCAsmParser &Parser) {
22 this->Parser = &Parser;
23 }
24
25 /// ParseDirectiveCGProfile
26 /// ::= .cg_profile identifier, identifier, <number>
ParseDirectiveCGProfile(StringRef,SMLoc)27 bool MCAsmParserExtension::ParseDirectiveCGProfile(StringRef, SMLoc) {
28 StringRef From;
29 SMLoc FromLoc = getLexer().getLoc();
30 if (getParser().parseIdentifier(From))
31 return TokError("expected identifier in directive");
32
33 if (getLexer().isNot(AsmToken::Comma))
34 return TokError("expected a comma");
35 Lex();
36
37 StringRef To;
38 SMLoc ToLoc = getLexer().getLoc();
39 if (getParser().parseIdentifier(To))
40 return TokError("expected identifier in directive");
41
42 if (getLexer().isNot(AsmToken::Comma))
43 return TokError("expected a comma");
44 Lex();
45
46 int64_t Count;
47 if (getParser().parseIntToken(
48 Count, "expected integer count in '.cg_profile' directive"))
49 return true;
50
51 if (getLexer().isNot(AsmToken::EndOfStatement))
52 return TokError("unexpected token in directive");
53
54 MCSymbol *FromSym = getContext().getOrCreateSymbol(From);
55 MCSymbol *ToSym = getContext().getOrCreateSymbol(To);
56
57 getStreamer().emitCGProfileEntry(
58 MCSymbolRefExpr::create(FromSym, MCSymbolRefExpr::VK_None, getContext(),
59 FromLoc),
60 MCSymbolRefExpr::create(ToSym, MCSymbolRefExpr::VK_None, getContext(),
61 ToLoc),
62 Count);
63 return false;
64 }
65